Wikipedia:Arbitration Committee/Party Guide/Expectations

Expectations of behavior during Arbitration proceedings
The behavior, good and bad, of parties during a case is carefully considered by Arbitrators when making their final decision.

Mooning the jury
Parties should be on their best behavior while adding evidence or making comments on arbitration pages. While this should be obvious, a surprising number of participants, having been accused of aggressive, uncivil or point of view editing, continue this behavior to the case itself. Comments made by the parties during the Arbitration case may be taken into account by the Committee in setting any remedies, and continued evidence of disruptive behavior is often seen as evidence that milder remedies (warnings or probation) will not have the desired effect, leading to topic or site bans. Remember that if you are on trial for assault, it is generally not a good idea to start punching witnesses in open court.

Rhetoric and blustering
Clear and persuasive presentation of evidence will almost always be more effective than any debates or arguments. Almost nothing useful ever comes out of arguments among parties on the workshop page, the evidence page, or the talk pages, and the longer the arguments get, the lower the chance of anything being noticed or valued by the arbitrators. If you must engage in discussion, short and simple questions to arbitrators are probably the most effective method.

Mistakes to avoid
ArbCom is typically pro-Wikipedia, generally considers that the Wikipedia method works, that Wikipedia is on the whole a successful project, and that admins are generally trustworthy. They explicitly choose any outcome that results in Wikipedia working better.

Therefore, arguments opposing Wikipedia's basic principles, suggesting a massive cabal of rogue admins, or holding the process to be an end in itself will not work.

Arguing about flaws in the arbitration process is usually a waste of time and will make arbitrators look dimly upon you.

Pettifoggery is likely to create prejudice against your cause, as a person who can win on the merits of their case will probably not resort to wikilawyering.